Drivers experience billions of dollars in congestion costs at intersections every year. Improving traffic signal timing could help reduce costs and delays. Sometimes you sit in your car at a traffic ...

The flight reductions imposed during the government shutdown are now over; the Federal Aviation Administration lifted them early Monday morning. Forty major U.S. airports and more than 5 million ...

The longest government shutdown in U.S. history delayed thousands of flights just weeks before the heavily traveled holiday season, reigniting debate over whether to privatize the U.S. air traffic ...